bugzilla: add update-only functionality

Closes #173.

Signed-off-by: Richard Marko <rmarko@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
bugzilla: fix log messages

Signed-off-by: Richard Marko <rmarko@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
bugzilla: pep8 compliance & coding style

Added few missing comments.

Part of #157.

Signed-off-by: Richard Marko <rmarko@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>
hub: make graph points on summary graph clickable

Closes #9.

Signed-off-by: Richard Marko <rmarko@redhat.com>
Signed-off-by: Michal Toman <mtoman@redhat.com>